Aseptic Technique Validation for staff who work at multiple sites

I recently took over responsibility for the sterile compounding areas at 2 hospitals and an infusion center, all part of the same health system. I have several employees, including myself, who compound sterile products at 2 sites, or all 3 sites. Since the facilities are not exactly the same (one clean room w/anteroom, 2 SCAs), should I have employees who work at multiple sites complete an ATV at each site where they compound?